package org.example.domain.strategy.service;


import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.example.domain.strategy.model.entity.RaffleAwardEntity;
import org.example.domain.strategy.model.entity.RaffleFactorEntity;
import org.example.domain.strategy.model.entity.StrategyAwardEntity;
import org.example.domain.strategy.repository.IStrategyRepository;
import org.example.domain.strategy.service.armory.IStrategyDispath;
import org.example.domain.strategy.service.rule.chain.factory.DefaultChainFactory;
import org.example.domain.strategy.service.rule.tree.factory.DefaultTreeFactory;
import org.example.types.enums.ResponseCode;
import org.example.types.exception.AppException;

import java.util.Date;

/**
 * 抽奖策略抽象类，定义抽奖的标准流程
 */
@Slf4j
public abstract class AbstractRaffleStrategy implements IRaffleStrategy{

    //策略仓储服务 -> domain层像一个大厨，仓储层提供米面粮油
    protected IStrategyRepository repository;
    //策略调度服务 -> 只负责抽奖处理，通过新增接口的方式，隔离职责，不需要使用方关心或者调用抽奖的初始化
    protected IStrategyDispath strategyDispath;
    //抽奖责任链 -> 从抽奖的规则中，解耦出前置规则为责任链处理
    protected DefaultChainFactory defaultChainFactory;
    //抽奖的决策树 -> 负责抽奖中到抽奖后的规则过滤，如抽到A奖品Id，之后要做次数的判断和库存的扣减
    protected DefaultTreeFactory defaultTreeFactory;

    public AbstractRaffleStrategy(IStrategyRepository repository, IStrategyDispath strategyDispath, DefaultChainFactory defaultChainFactory, DefaultTreeFactory defaultTreeFactory) {
        this.repository = repository;
        this.strategyDispath = strategyDispath;
        this.defaultChainFactory = defaultChainFactory;
        this.defaultTreeFactory = defaultTreeFactory;
    }

    @Override
    public RaffleAwardEntity performRaffle(RaffleFactorEntity raffleFactorEntity){

        //1.参数校验
        String userId = raffleFactorEntity.getUserId();
        Long strategyId = raffleFactorEntity.getStrategyId();
        if(null == strategyId || StringUtils.isBlank(userId)){
            throw new AppException(ResponseCode.ILLEGAL_PARAMETER.getCode(),ResponseCode.ILLEGAL_PARAMETER.getInfo());
        }

        //2.责任链抽奖计算【这步拿到的是初步的奖品ID,之后需要根据奖品ID处理抽奖】注意：黑名单、权重等非默认抽奖的直接返回抽奖结果
        DefaultChainFactory.StrategyAwardVO chainStrategyAwardVO = raffleLogicChain(userId,strategyId);
        log.info("抽奖策略计算-责任链 {} {} {} {}",userId,strategyId,chainStrategyAwardVO.getAwardId(),chainStrategyAwardVO.getLogicModel());
        if(!DefaultChainFactory.logicModel.RULE_DEFAULT.getCode().equals(chainStrategyAwardVO.getLogicModel())){
            return buildRaffleAwardEntity(strategyId, chainStrategyAwardVO.getAwardId(), chainStrategyAwardVO.getAwardRuleValue());
        }



        //3. 规则树抽奖过滤【奖品ID，会根据抽奖次数判断、库存判断、兜底返回最终的可获得的奖品信息】
        DefaultTreeFactory.StrategyAwardVO treeStrategyAwardVO = raffleLogicTree(userId, strategyId, chainStrategyAwardVO.getAwardId(),raffleFactorEntity.getEndDateTime());
        log.info("抽奖策略计算-规则树 {} {} {} {}",userId,strategyId,treeStrategyAwardVO.getAwardId(),treeStrategyAwardVO.getAwardRuleValue());

        //4. 返回抽奖结果
        return buildRaffleAwardEntity(strategyId, treeStrategyAwardVO.getAwardId(), treeStrategyAwardVO.getAwardRuleValue());
    }


    private RaffleAwardEntity buildRaffleAwardEntity(Long strategyId,Integer awardId,String awardConfig){
        StrategyAwardEntity strategyAward = repository.queryStrategyAwardEntity(strategyId,awardId);
        return RaffleAwardEntity.builder()
                .awardId(awardId)
                .awardTitle(strategyAward.getAwardTitle())
                .awardConfig(awardConfig)
                .sort(strategyAward.getSort())
                .build();
    }

    /**
     * 抽奖计算，责任链抽奖方法
     * @param userId
     * @param strategyId
     * @return  奖品ID
     */
    public abstract DefaultChainFactory.StrategyAwardVO raffleLogicChain(String userId,Long strategyId);

    /**
     * 抽奖结果过滤，决策树抽奖方法
     *
     * @param userId
     * @param strategyId
     * @param awardId
     * @param endDateTime
     * @return 过滤结果【奖品ID，会根据抽奖次数判断、库存判断、兜底返回最终的可获得奖品信息】
     */
    public abstract DefaultTreeFactory.StrategyAwardVO raffleLogicTree(String userId, Long strategyId, Integer awardId, Date endDateTime);


}
